Zvi Rackover d91a5044bd LoopVectorize: MaxVF should not be larger than the loop trip count ... Summary: Improve how MaxVF is computed while taking into account that MaxVF should not be larger than the loop's trip count. Other than saving on compile-time by pruning the possible MaxVF candidates, this patch fixes pr34438 which exposed the following flow: 1. Short trip count identified -> Don't bail out, set OptForSize:=True to avoid tail-loop and runtime checks. 2. Compute MaxVF returned 16 on a target supporting AVX512. 3. OptForSize -> choose VF:=MaxVF. 4. Bail out because TripCount = 8, VF = 16, TripCount % VF !=0 means we need a tail loop. With this patch step 2. will choose MaxVF=8 based on TripCount. Reviewers: Ayal, dorit, mkuper, hfinkel Reviewed By: hfinkel Subscribers: hfinkel, llvm-commits Differential Revision: https://reviews.llvm.org/D37425 llvm-svn: 312472		2017-09-04 08:35:13 +00:00
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CMakeLists.txt	[LV] Fix PR34248 - recommit D32871 after revert r311304	2017-08-27 12:55:46 +00:00
LLVMBuild.txt
LoadStoreVectorizer.cpp	[KnownBits] Add bit counting methods to KnownBits struct and use them where possible	2017-05-12 17:20:30 +00:00
LoopVectorize.cpp	LoopVectorize: MaxVF should not be larger than the loop trip count	2017-09-04 08:35:13 +00:00
SLPVectorizer.cpp	[Analysis, Transforms] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC).	2017-09-01 21:37:29 +00:00
Vectorize.cpp	Remove the BBVectorize pass.	2017-06-30 07:09:08 +00:00
VPlan.cpp	[LV] Fix PR34248 - recommit D32871 after revert r311304	2017-08-27 12:55:46 +00:00
VPlan.h	[LV] Fix PR34248 - recommit D32871 after revert r311304	2017-08-27 12:55:46 +00:00